how can i tell my son that he is an adopted child without hurting his feelings?

with all the love you give to him. im sure he will understand. Let him understand by telling him, no matter what you love him and he is very important to you, nothing will change and tell him he is adopted. tell him it doesnt mean your telling him that fact you dont love him but your telling him because he has the right to know and for you not hiding anything from him and you will be moving on happily without secrets. The mind of a child if it was mold with good thoughts and values and was filled by loved. he will have the very wide understanding with such situation.

if you showered your kid with so much love and affection, he/she will love you so much, too. and i think even if you tell him/her that he/she's adopted, it won't make you less of a parent to your kid. he/she will appreciate what you've done for her/him. just be there for your kid. support him/her always. be positive and help him develop love.

Just wait for some time,

it depends on several aspects. if he is of different color or of a different race and culture, u need not take much pains to tell him. he will understand most of the thing. if he is from similar cultural background, it needs more attention and smoother way to make him realize. u can tell him when he is a little older. coz his age brings him some rationality and he will try to understand.

Yes u can tell him, but tell him when he grows up.